New epilepsy drug vormatrigine tested for Long-Term safety in 700 adults
NCT ID NCT07287163
First seen Jun 27, 2026 · Last updated Aug 04, 2026 · Updated 2 times
Summary
This study is testing the long-term safety of a once-daily drug called vormatrigine in 700 adults with focal or generalized tonic-clonic seizures. Participants must have already taken vormatrigine in a previous trial or program. The main goal is to check for side effects and changes in vital signs, not to measure how well the drug stops seizures.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- vormatrigine (a once-daily oral drug for seizures)
- What this could lead to
- If successful, this could confirm that vormatrigine is safe for long-term use and help control seizures in adults with epilepsy.
- What could go wrong
- This is an extension study focused on safety, not on proving the drug works. It only includes people who already tolerated the drug, so results may not apply to all patients. Side effects are still being monitored.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 3
Large-scale testing in a bigger group. Usually the last step before a treatment can be approved.
- Participants
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About 700 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Oct 2025
- Expected to finish
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Dec 2028
An estimate. End dates often move.
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 85 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Participant who completed an eligible clinical trial (unless agreed by the sponsor medical monitor), including PRAX-628-212, PRAX-628-321 or other vormatrigine trials, or participant who has received vormatrigine outside of an eligible clinical trial (such as an expanded access program) * Participant who had adequate seizure diary and vormatrigine adherence and had been otherwise adherent to the study procedures in the opinion of the investigator unless deemed unacceptable by sponsor Exclusion Criteria: * Participant who withdrew or discontinued treatment from the treatment period of an eligible clinical trial unless deemed acceptable by the sponsor * Participant who plans to enter another interventional investigational study or is on any prohibited medication * Participant who is pregnant, lactating or planning to become pregnant * Participant who is ineligible for the extension clinical trial in the view of the investigator
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Get notified about this study
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
36 sites in 6 countries. The list below names each one and where it is.
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The official record
The full official record for this study. This one lists no contact details, but it is the first place any would appear.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Praxis Research Site
Miami, Florida, 33186, United States
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Praxis Research Site
Miami Lakes, Florida, 33016, United States
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Praxis Research Site
Naples, Florida, 34116, United States
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Praxis Research Site
Lafayette, Louisiana, 70508, United States
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Praxis Research Site
Bethesda, Maryland, 20817, United States
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Praxis Research Site
Plymouth, Michigan, 48170, United States
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Praxis Research Site
Chesterfield, Missouri, 63005, United States
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Praxis Research Site
Hackensack, New Jersey, 07601, United States
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Praxis Research Site
Amherst, New York, 14226, United States
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Praxis Research Site
Middletown, New York, 10941, United States
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Praxis Research Site
New York, New York, 10016, United States
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Praxis Research Site
Niagara Falls, New York, 14304, United States
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Praxis Research Site
Philadelphia, Pennsylvania, 19107, United States
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Praxis Research Site
El Paso, Texas, 79912, United States
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Praxis Research Site
Houston, Texas, 77058, United States
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Praxis Research Site
Porto Alegre, Rio Grande do Sul, Brazil
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Praxis Research Site
São José do Rio Preto, São Paulo, Brazil
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Praxis Research Site
Bielefeld, 33617, Germany
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Praxis Research Site
Tübingen, 72076, Germany
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Praxis Research Site
Pozzilli, Isernia, Italy
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Praxis Research Site
Bosisio Parini, Lecco, Italy
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Praxis Research Site
Milan, 20133, Italy
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Praxis Research Site
Naples, Italy
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Praxis Research Site
Pavia, 27100, Italy
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Praxis Research Site
Pisa, Italy
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Praxis Research Site
Ponderano, Italy
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Praxis Research Site
Roma, Italy
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Praxis Research Site
Bydgoszcz, 85163, Poland
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Praxis Research Site
Katowice, 40123, Poland
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Praxis Research Site
Lublin, Poland
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Praxis Research Site
Warsaw, Poland
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Praxis Research Site
Barcelona, 08003, Spain
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Praxis Research Site
Madrid, 28040, Spain
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Praxis Research Site
Málaga, 29010, Spain
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Praxis Research Site
Terrassa, 08222, Spain
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Praxis Research Site
Valencia, 46026, Spain
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Can a new daily pill tame focal seizures?
- New seizure drug shows promise in large trial
- New pill aims to curb focal seizures in adults
- New epilepsy drug RAP-219 enters final testing phase
- Could a zapping headband tame tough seizures?
- New epilepsy drug candidate iQ-007 enters first human safety trial